statistics
connecting data 144 –7
normal curve 140 –3
probability 128 , 136 –8
Steiner Triple System (STS) 115
Stokes, George Gabriel 107
string theory 97 , 99
subtracting, zero 5
Sudoku 172
superabundant numbers 40 –1
supergolden ratio/rectangle 47 , 51
syllogism 65
symmetry 152 –5, 205
T
tetrahedron 93
theorem 68 , 70 , 205
three-bar motion 90
topology 92 –5, 99
torus 122
travelling salesperson 184 –7
travel/transport 159 , 183
trees 118 , 119
triangles 84 –7
constructing 82
elliptic geometry 111
Fano plane 114
Pascal’s 52 –5
Sierpinski gasket 102
symmetry 154
triangular numbers 16 –17
trigonometry 84 , 86
tripod 152 , 154
triskelion 152 , 153 , 154
twin primes 38 –9, 205
U
unit fraction 205
unity 35